- Obituary (1658 Hits)
- Obscurity (2771 Hits)
- Officium Triste (1290 Hits)
- Omission (1187 Hits)
- Omnium Gatherum (88 Hits)
- Onheil (789 Hits)
- Onkel Tom Angelripper (829 Hits)
- Onslaught (1465 Hits)
- Oppressus (1452 Hits)
- Orae (1315 Hits)
- Orden Ogan (1251 Hits)
- Out For Blood (876 Hits)
- Outrage (JPN) (348 Hits)
- Overkill (1192 Hits)
- Ozzy Osbourne (1352 Hits)